Re: [RFC Part1 PATCH v3 02/17] x86/CPU/AMD: Add the Secure Encrypted Virtualization CPU feature

From	Borislav Petkov <bp@suse.de>
Newsgroups	linux.kernel
Subject	Re: [RFC Part1 PATCH v3 02/17] x86/CPU/AMD: Add the Secure Encrypted Virtualization CPU feature
Date	2017-07-25 17:40 +0200
Message-ID	<u7a6e-4Ah-19@gated-at.bofh.it> (permalink)
References	(3 earlier) <u79aa-3YE-19@gated-at.bofh.it> <u79aa-3YE-17@gated-at.bofh.it> <u79MS-4rG-17@gated-at.bofh.it> <u79MS-4rG-15@gated-at.bofh.it> <u7a6e-4Ah-21@gated-at.bofh.it>
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On Tue, Jul 25, 2017 at 10:29:40AM -0500, Tom Lendacky wrote:
> But early_identify_cpu() calls get_cpu_cap() which will check for cpuid
> leaf 0x80000008 support and set x86_phys_bits.

Right, but it can't be less than 32, can it? And if it is more than 32
bits, then it probably doesn't really matter on 32-bit. Unless it is
less than 36 bits and you do PAE...

> I'll try to build and run a 32-bit kernel and see how this all flows.

Yeah, that would be good.

Thanks.

-- 
Regards/Gruss,
    Boris.

SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)
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Re: [RFC Part1 PATCH v3 02/17] x86/CPU/AMD: Add the Secure Encrypted  Virtualization CPU feature Borislav Petkov <bp@suse.de> - 2017-07-25 12:30 +0200
  Re: [RFC Part1 PATCH v3 02/17] x86/CPU/AMD: Add the Secure Encrypted  Virtualization CPU feature Borislav Petkov <bp@suse.de> - 2017-07-25 16:40 +0200
    Re: [RFC Part1 PATCH v3 02/17] x86/CPU/AMD: Add the Secure Encrypted  Virtualization CPU feature Borislav Petkov <bp@suse.de> - 2017-07-25 17:20 +0200
      Re: [RFC Part1 PATCH v3 02/17] x86/CPU/AMD: Add the Secure Encrypted  Virtualization CPU feature Borislav Petkov <bp@suse.de> - 2017-07-25 17:40 +0200

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